diff options
| author | Rob Clark <robdclark@chromium.org> | 2021-12-07 13:57:52 -0800 |
|---|---|---|
| committer | Douglas Anderson <dianders@chromium.org> | 2021-12-08 08:47:10 -0800 |
| commit | 03848335b5b1faa4a4641fcf30b7c233579a45aa (patch) | |
| tree | c491e6b823978d5bbc9c692dbbadcf51f7340d79 | |
| parent | d6c75c295f67b26fad8ba2e72db80e0f744e9da9 (diff) | |
drm/bridge: sn65dsi86: defer if there is no dsi hostdrm-misc-next-2021-12-09
Otherwise we don't get another shot at it if the bridge probes before
the dsi host is registered. It seems like this is what *most* (but not
all) of the other bridges do.
It looks like this was missed in the conversion to attach dsi host at
probe time.
Fixes: c3b75d4734cb ("drm/bridge: sn65dsi86: Register and attach our DSI device at probe")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
[dianders: squashed in Stephen's simplification]
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211207215753.635841-1-robdclark@gmail.com
| -rw-r--r-- | drivers/gpu/drm/bridge/ti-sn65dsi86.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 02b490671f8f..c9452eec968b 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -704,7 +704,7 @@ static struct ti_sn65dsi86 *bridge_to_ti_sn65dsi86(struct drm_bridge *bridge) static int ti_sn_attach_host(struct ti_sn65dsi86 *pdata) { - int ret, val; + int val; struct mipi_dsi_host *host; struct mipi_dsi_device *dsi; struct device *dev = pdata->dev; @@ -714,16 +714,12 @@ static int ti_sn_attach_host(struct ti_sn65dsi86 *pdata) }; host = of_find_mipi_dsi_host_by_node(pdata->host_node); - if (!host) { - DRM_ERROR("failed to find dsi host\n"); - return -ENODEV; - } + if (!host) + return -EPROBE_DEFER; dsi = devm_mipi_dsi_device_register_full(dev, host, &info); - if (IS_ERR(dsi)) { - DRM_ERROR("failed to create dsi device\n"); + if (IS_ERR(dsi)) return PTR_ERR(dsi); - } /* TODO: setting to 4 MIPI lanes always for now */ dsi->lanes = 4; @@ -739,13 +735,7 @@ static int ti_sn_attach_host(struct ti_sn65dsi86 *pdata) pdata->dsi = dsi; - ret = devm_mipi_dsi_attach(dev, dsi); - if (ret < 0) { - DRM_ERROR("failed to attach dsi to host\n"); - return ret; - } - - return 0; + return devm_mipi_dsi_attach(dev, dsi); } static int ti_sn_bridge_attach(struct drm_bridge *bridge, @@ -1267,8 +1257,10 @@ static int ti_sn_bridge_probe(struct auxiliary_device *adev, drm_bridge_add(&pdata->bridge); ret = ti_sn_attach_host(pdata); - if (ret) + if (ret) { + dev_err_probe(pdata->dev, ret, "failed to attach dsi host\n"); goto err_remove_bridge; + } return 0; |